The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2001
Filed:
Dec. 06, 1999
Applicant:
Inventors:
Martin Steinert, Seligenstadt, DE;
Daniel Rumplik, Hampden, MA (US);
Assignee:
Nord-Micro Elektronik Feinmechanik, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F24F 1/314 ; F16K 1/22 ;
U.S. Cl.
CPC ...
F24F 1/314 ; F16K 1/22 ;
Abstract
Disclosed is a differential valve specifically a cabin air discharge valve for use in the cabin pressure regulating system of an airplane. The valve has two valve stages for closing a valve port including a smaller first stage and a larger second stage. The first and second stages are connected to a common drive gear mechanism that actuates the smaller first valve stage separately and prior to actuating the larger second valve stage. Also disclosed is a method for regulating cabin pressure by means of the differential valve.